95 grains per gallon maximumf water hardness. 30,000 grain of capacity - whole home system, demand initiated electronic controls (monitors your water usage), LED salt tant light, salt level indicator water flow, indicator, space saving single tank design, salt saving technology, includes by-pass valve, drain line and installation kit, reduces up to 7 ppm clear water iron, ideal for houses with families of up to 4 and high water hardnesses, Made in USA. 44-3/4"h x 14-1/2"w x 21-1/4"d. Warranty: 1 year full in home, 3 year electronics, 10 year tank.